Then you might want to get some psychological help, ES.
No it's not a happy time for those parents. But at least they can have some hope of seeing their children again and knowing that their children did not go out of existence forever. Atheist? No hope. They've seen their children for the last time.
Christians are to value life, and hence would not take their own life. Nor would they " send some kids to see their "loving god"". We have hope after we have died. It's not about us sending anyone (inluding ourselves) anywhere.
But if you're happy in knowing that those kids are dead for all time, then fine. If you're happy knowing that when your kids die they will be forever dead as well, fine. But it doesn't seem like a very happy existence to me. Especially knowing that at any moment some wack job could do the same to either you or your kids.